@article{CMH_1981__56_139856,
     author = {Victor Bangert},
     title = {On the existence of escaping geodesics.},
     journal = {Commentarii mathematici Helvetici},
     pages = {59--65},
     year = {1981},
     volume = {56},
     zbl = {0462.58013},
     url = {http://geodesic.mathdoc.fr/item/CMH_1981__56_139856/}
}